Type-form for printing paper-bag tubes



(No Model,)

A. J. BOYNTON.

TYPE FORM FOR PRINTING PAPER BAG TUBES.

No. 331,372. Patented Dec. 1, 1885.

I i i i i l i i i i SHDUIS Witnesses. c nvenior.

P .jaygmjntmp ANDREW J. BOYNTON, OF MALDEN, MASSACHUSETTS.

TYPE-FORM FOR PRINTING PAPER-BAG TUBES.

SPECIFICATION forming part of Letters Patent No. 331,372, dated December1, 1885.

Application filed March 18, 1884. Serial No. 124,608. (No model.)

To all whom it may concern:

Be it known that 1, ANDREW J. BOYNTON, a citizen of the United States,residing at Malden, in the county of Middlesex and State ofMassachusetts, have invented a new and useful Improvement in Type- Formsfor Printing Paper-Bag Tubes, of which the following is a specification.

The object of my invention is to so construct and arrange the type-formon the cylinder of a tubing and printing mechanism that a tube may beprinted when the paste between the folds is wet from the pastor withoutdestroying the adhesion of the folds of the tube to one another. In thisprocess of tubing the paper is necessarily folded so that one edge willoverlap the other, and thus make along the center of the tube threethicknesses of paper, while there will be only two thicknesses at thesides. Undue pressure upon the ridge thus formed forces the moisturefrom the paste into the body of the paper, entirely destroying itsutility.

In the drawings, Figure 1 shows a baglength printed on a form of thecommon c0nstruction, and Fig. 2 one printed on a form of my improvedconstruction.

a represents the printed side of the tube, a the folded side, and c theline of paste.

In the tube shown in Fig. 1, my experience shows that wherever the heavyletters-as the o in Louis, and the o in Flour come upon the line ofpaste the pressure requisite to print the tube forces from the paste itsadhesive properties in all those places so pressed by the cut or types,thus making imperfectly-pasted baglengths, unsuitable for the uses forwhich they are designed until the holes left in the seam have beenpatched by hand. To obviate this difficulty I have tried various kindsof paste and glue; but the pressure necessary for printing destroyed thecohesive power of all materials with which I experimented where theywere pressed by the type. I also removed portions of the blanket fromthe line of paste, thus reducing the pressure upon it; but in this caseit would receive no impression from the type. For these reasons I havecontrived the construction and arrangement of the type upon the form toprint upon the bag, as shown in Fig. 2, and. have removed all the heavyparts of the form from the line of the paste, so constructing the typethat while bold, heavy printing is secured those portions of it which docome over the line of paste are so slightas the o in Flourthat theirimpact upon it will produce no injurious results.

By means of this construction and arrangement my baglengths are leftthoroughly pasted without injury from the printing process.

I claim as my invention- In a mechanism for printing paper bag tubeshaving a single wet pasteline, a typet'orm the body of which is adaptedto make bold, heavy, printing on each side of said pasteline, thecentral part of the form being made with a very light face to makeimpression over the paste-line, substantially as and for the purposespecified.

A. J. BOYNTON.

Witnesses:

' CHAS. F. SLEEPER, W. S. Hurourus.

